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Plate Boundaries

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Sabrina Tobar

on 7 February 2014

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Transcript of Plate Boundaries

East Africa Rift Valley
East Africa
Plate Boundaries
By: Meitzel Guzmán & Sabrina Tobar
Tall mountains are slowly produced over millions of years.
The mountains keep on growing as the plates converge.
Even though the plates move horizontally, the crust moves vertically.

When two plates separate within a continent, continental rifts are formed.
Continental rifts are enormous splits in Earth's crust.
After many millions of years, rifts can separate a body of land into two different continents.
Volcanic arcs can form where an oceanic plate subducts under a continental one.
The volcanoes end up on top of the continental plate.
When two plates collide, the denser one sinks under the more buoyant one in a process called subduction.
Subduction creates ocean trenches. Ocean trenches are deep, underwater troughs.
Trenches are the deepest parts of the ocean.
Volcanoes can form under water and emerge as islands.
A curved line of volcanoes next to a plate boundary is called a volcanic arc.
When plates move apart, tension causes Earth's crust to stretch.
Long mountain ranges are produced.
When the plates move apart, hot rock rises from the mantle, forming the mountain ranges.
Tall, long mountain ranges formed where oceanic plates diverge are called mid-ocean ridges.
Transform faults form where two transform plates slide past each other.
An area of many fractured pieces of crust along a large fault is called a fault zone.
When two transform plates slide past each other, stress creates earthquakes.
Mount Shasta
San Andreas Fault
Himalayas Mountains
Juan de Fuca
West of Canada
Mariana Trench
East of Asia
Full transcript